EXC_BAD_ACCESS signal received?

From your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks, but not whether you are experienced with Objective C in general. If you've come from another background it can take a little while before you really internalise the memory management rules - unless you make a big point of it.

A major cause of EXC_BAD_ACCESS is from trying to access released objects.

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